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arXiv 1604.02130math.STstat.TH
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半参数和非参数回归的分位数过程

Quantile Processes for Semi and Nonparametric Regression

Shih-Kang Chao, Stanislav Volgushev, Guang Cheng

摘要:

分位数曲线的集合提供了条件分布的全貌。在不同分位数水平下,估计曲线的适当居中和缩放版本产生所谓的分位数回归过程(QRP)。本文在一般的级数逼近框架下建立了QRP问题的弱收敛性,包括增维线性模型、非参数模型和部分线性模型。在最后一类模型中得到了一个有趣的结果,其中参数和非参数估计量是渐近独立的。我们的一般过程收敛结果的应用包括构造非交叉分位数曲线和估计条件分布函数。由于独立的兴趣,我们得到了一系列的Bahadur表示与指数界的尾概率的所有剩余条款。这类界在分析分而治之下的统计推断过程中是潜在有用的。

英文摘要:

A collection of quantile curves provides a complete picture of conditional distributions. Properly centered and scaled versions of estimated curves at various quantile levels give rise to the so-called quantile regression process (QRP). In this paper, we establish weak convergence of QRP in a general series approximation framework, which includes linear models with increasing dimension, nonparametric models and partial linear models. An interesting consequence is obtained in the last class of models, where parametric and non-parametric estimators are shown to be asymptotically independent. Applications of our general process convergence results include the construction of non-crossing quantile curves and the estimation of conditional distribution functions. As a result of independent interest, we obtain a series of Bahadur representations with exponential bounds for tail probabilities of all remainder terms. Bounds of this kind are potentially useful in analyzing statistical inference procedures under divide-and-conquer setup.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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